Externally triggered microcapsules

Details Externally triggered microcapsules Externally triggered microcapsules

2011-06-28

2011-06-28

Padmanabhan, Sreeni (Department: 1627)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Liposomes

C424S451000, C424S489000, C424S490000

Reexamination Certificate

active

07968117

ABSTRACT:
Disclosed are microcapsules comprising a polymer shell enclosing one or more immiscible liquid phases in which a drug or drug precursor are contained in a liquid phase. The microparticles also contain magnetic particles that can be heated by application of an external magnetic field and thus heated to a predetermined Curie temperature. Heating of the particles melts the polymer shell and releases the drug without causing heating of surrounding tissues.

REFERENCES:
patent: 2971916 (1961-02-01), Schleicher et al.
patent: 4247406 (1981-01-01), Widder et al.
patent: 4345588 (1982-08-01), Widder et al.
patent: 4652257 (1987-03-01), Chang
Image File Wrapper for U.S. Appl. No. 09/079,758; Entitled: Externally Triggered Microcapsules; filed May 15, 1998; Confirmation No. 8692.
Image File Wrapper for U.S. Appl. No. 11/423,038; Entitled: Externally Triggered Microcapsules; filed Jun. 8, 2006; Confirmation No. 5127.

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